I have divided this guide in 6 sections according to the feats you'll need to perform in order to earn each type of achievement:

• Scenario: these are the achievements that are directly related to either the core mechanics of a particular scenario or to one of its tactical missions.
  
• Campaign: these are the achievements that are directly related to the completion of this game's campaign.
  
• Collectibles: these are the achievements that are directly related to the acquisition or use of certain items.
  
• Posse: I originally intended to add this achievement to the previous section, but Steam Guide Maker's character limitation won't allow that. This achievement is directly related to the recruitment of a certain number of posse members.
  
• Gameplay: these are the achievements that are directly related to certain gameplay feats that can be only performed during tactical missions.
  
• Scars of Freedom Expansion Pack: these are the achievements that were added in the Scars of Freedom DLC.

In some of the achievement descriptions I'll direct you to certain sections of the walkthrough posted below, which I'll refer to as W, e.g, check the AMoT Mission 2 section of W. http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1237813721
Note: feedback and grammar corrections (English isn’t my mother tongue) are appreciated.

The Aspirton Incident
Complete the Aspirton Bank Robbery in "As Good as Dead" before demons arrive


At some point of the above-mentioned scenario you'll have to interrogate one of the Masked Man thugs at Kraimer’s Inn in order to progress the story. Once you do that, a new side quest regarding robbing the Aspirton bank will be unlocked. The easiest way to complete said mission and get the achievement in the process is to subdue the bank director and plunder the bank's safe without triggering the combat stage. If you want a detailed explanation on how to achieve this, check the AGaD Mission 4 section of W.


His Leniency, The Inquisitor
Complete "Law & Order" having committed at most 2 massacres


The core mechanic of the above-mentioned scenario is the search and acquisition of cipher pieces, all of which will be safeguarded by a different Order member. In order to reach the cipher piece carriers, you can either spend some money to learn their identities or just massacre everyone inside the general area where they'll be hiding and search through the remains afterwards.

When pursuing this achievement, you’ll have to avoid choosing the second option as often as possible, which is not that difficult, as you'll earn lots of money during the scenario.


Through Thick and Thick
Complete "Graveyard Shift" without anyone being hungry at any time


The core mechanic of the above-mentioned scenario is times of the day and hunger management. Days in this scenario are split into 4 slots: morning, midday, afternoon and night. Every time your posse visits a location, time will advance a slot, but do note that some events can advance time several slots at once if you pick a time-consuming choice.

Each time night changes to day, you’ll have to spend 1 Food Portion per posse member in order to keep them well fed, so that's what you'll have to do every night if you want to get the achievement.

Food Portions can be bought at many locations and are very cheap, so you shouldn’t have any problems keeping your posse from starving if you tackle tactical missions as soon as possible and avoid unnecessary comings and goings between locations.


Double Excellence
Fully develop two technological domains during "Method in Madness"


The core mechanic of the above-mentioned scenario is the development of technological domains, which is accomplished by investing Blueprints at a specific location: Laboratory. Blueprints can be obtained in four ways: by buying them, completing certain events, using a Revealer on Trumercliff's Notes or decreasing Solomon’s sanity.

Considering that each technological domain has 5 development levels and that 1 Blueprint advances the development of a single domain by 1 level, you'll need to acquire a minimum of 10 Blueprints in order to get this achievement. You'll be able to easily obtain said number of Blueprints just by playing normally through the scenario.


Daring but Careful
Complete "In Gold We Trust" with no more than 50 peons dead


One of the core mechanics of the above-mentioned scenario is peon management. You will be able to hire peons at certain locations of the scenario map and then order them to carry out several assignments, but do note that every time you command them to perform a task they'll run the risk of dying or getting injured.

During the In Gold We Trust scenario you'll only be forced to use peons at two locations: Old Sawmill, where you'll need to gather some wood so that you can build some rafts, and Barrows, where you'll need to wipe out the savages that will be holed up in there so that your posse can safely access the Old Cemetery and Excavation Site locations.

If you only make use of your hired peons on those two occasions, by the time you finish the scenario you should have only lost 20-30 peons, so, any other task you need done, mainly getting provisions, should be carried out by your posse in order to avoid forfeiting this achievement.


What Goes Around, Comes Around
Kill Joaquín Pérez with the Cañón Calavera


First of all, do note that Joaquín Pérez can only be fought during the second tactical mission of the A Matter of Time scenario. There are two ways to get this achievement:

The first and most straightforward requires you to play through the above-mentioned scenario a second time, as the Cañón Calavera will only be unlocked at the Fate Trader shops' stock once you kill Joaquín Pérez, so, if you have unlocked said weapon by the time you reach the above-mentioned mission, stop by the Fate Trader shop and buy 1 Cañón Calavera before starting said mission.

The second one is luck-dependent, and requires you to acquire the Scavenger ability card prior to triggering the previously mentioned mission. As the odds of you obtaining said card by the time you reach said mission are quite low, just enable the Full deck gameplay mod at the beginning of the scenario if you're going to give this method a try.

Every time a character uses the Scavenger ability, there’s a chance he/she’ll loot a Cañón Calavera, but remember that said ability only works if the character using it stands on the exact tile where an enemy died, so pay special attention to that detail when killing enemies if you make use of this method.

If you want some more directions on how to get this achievement, check the A Matter of Time guide of W.


On Earth, as It Is in Hell
Establish Warren's new world order


Before triggering the last tactical mission of the On Earth, as It Is in Hell scenario you’ll be presented with a choice: either to keep playing as Warren’s posse or to play as a different posse led by Undertaker.

In order to get this achievement, you must choose the first option and make Warren activate the contraption that will be marked on the mission map as soon as every enemy is dead.


Requiem for a Gunfighter
Restore order in the Weird West


Before triggering the last tactical mission of the On Earth, as It Is in Hell scenario you’ll be presented with a choice: either to keep playing as Warren’s posse or to play as a different posse led by Undertaker.

In order to get this achievement, you must either choose the second option or pick the first one and make Warren use the Suicide ability once every enemy is dead.

Raw deal
Complete “Hard times”


See the Once Upon a Time in the Weird West achievement description for more details.


Vengeance Served Cold
Complete "As Good as Dead"


See the Once Upon a Time in the Weird West achievement description for more details.


Everlasting Fame and Fortune
Complete "In Gold We Trust"


See the Once Upon a Time in the Weird West achievement description for more details.


The Meaning of Life
Complete "Graveyard Shift"


See the Once Upon a Time in the Weird West achievement description for more details.


Sanity Engineered
Complete "Method in Madness"


See the Once Upon a Time in the Weird West achievement description for more details.


Drowned in Blood
Complete "Law & Order"


See the Once Upon a Time in the Weird West achievement description for more details.


A Gift Scorned
Complete "A Matter of Time"


See the Once Upon a Time in the Weird West achievement description for more details.


Once Upon a Time in the Weird West
Complete all Scenarios


Pretty self-explanatory. This achievement will pop up once you complete the 8 scenarios that compose this game's campaign. If you are struggling to beat any scenario, I recommend checking its corresponding guide on W.


Welcome to Hard Times
Complete a single Scenario on Hard difficulty, with both Ironman and Injuries enabled


See the Welcome to Even Harder Times achievement description for more details.


Welcome to Even Harder Times
Complete every Scenario on Hard, every Scenario with Injuries and every Scenario with Ironman enabled.


Updated thanks to ItsOrca


Another quite self-explanatory achievement. Fortunately, you don't need to complete every scenario in a row when pursuing this achievement, so earning it it's easier than it sounds. It's even easier if you consider that you can fulfill each requirement separately, so if you feel that going for a Hard+Injuries+Ironman run would be too difficult, you can split it into 2 or even 3 runs.

Ironman is by far the toughest of the three modifiers, but I think that anyone can beat it by following three simple guidelines:

1. Complete every scenario at least once before attempting to earn this achievement. This is the most effective way to learn what you’ll be facing during each scenario, which will in turn allow you to tackle each challenge more efficiently.
   
   
2. Prioritize buying the most powerful trinkets available at the Fate Trader shops. The trinkets I find to be the most useful are: Candle of the Dead, Doomsday Watch, Cañón Calavera and The Judge. Having any of these trinkets on your possession will make things considerably easier, as they'll greatly boost your characters' Damage and/or Aim.
   
   
3. Always keep your essential characters well provisioned and protected by following these guidelines:
   
   
   • Equip two healing items on each of them as often as possible.
     
   • Never send them to scout the battlefield unless you have no other choice. The same applies to using them to rush enemies.
     
   • Always keep them in full cover spots that can't be easily flanked.
     
   • Whenever they are at low health or in a vulnerable position, do not use high Luck-consuming abilities, except for the Dodge ability, which can come in handy if one of your characters gets surrounded.
     
   • Prioritize equipping them with any ability cards that grant HP regeneration such as Shadow Salve, Cannibal or Prayer. Also, equipping the Vengeance ability on a character is always a good way to increase their survivability.
     
   • If at any point during a tactical mission a misclick makes a character end up in a bad spot, there's a way to prevent that situation from snowballing into a defeat, but it's kind of a cheese/exploit: just press the "Esc" key and select the “Quit to Menu” option. This will reset the mission and you'll be able to give it another try. Kind of makes you wonder why they removed the “Restart” option from the menu when playing on Iron Man mode in the first place.

If you find this advice somewhat vague and would rather learn the most effective way to beat every single scenario, I recommend you check W.

The Searcher
Unlock all Trinkets in the game


Trinkets are items that can be unlocked at the Fate Trader shops' stock either by progressing normally through a scenario or by completing some specific events on a certain way. There are 3 trinkets per scenario:

Hard Times

• Repeater Rifle: impossible to miss. You’ll obtain it after asking for help at Mexican Town.
  
• Snake Leather Boots: you’ll receive it automatically after completing the “Clean up Mexican Town of bandits” side quest. In order to unlock said quest, go to Shady Joint after rescuing Florence and ask about Mexican Town.
  
• Relic: it can be unlocked at the beginning of the scenario. In order to obtain it, just head to Collapsed Mine and choose to crawl all the way to the bottom.

As Good as Dead

• Shotgun Revolver: it will be awarded to Warren once you complete the “Kill 100 people” side objective. In order to reach said number, just choose to kill innocent people whenever the opportunity arises.
  
• Baby No. 9: you can get this trinket if you choose to raid Aspirton during the day and then release Childeater from his cell during the ensuing tactical mission.
  
• Skin Vest: in order to obtain it, go to Hope to learn about the riddle concerning the thief’s grave and then dig up Abandoned Grave.

In Gold We Trust

• Serpent Amulet: impossible to miss. Go to Excavation Site after clearing the Barrows that surround it and you’ll get it.
  
• Ivory Flintlock Pistol: impossible to miss. It is automatically unlocked after recruiting Víctor Suncove.
  
• Holy Musket: in order to obtain it you must send some scouts from Mission Ruins and then kill the savages in the Barrows that surround the Old Cemetery. Once they’re dead, go to said location and you’ll obtain this trinket.

Graveyard Shift

• Bonehand Rifle: impossible to miss. You'll obtain it after rescuing Reverend Ashmore from the madmen.
  
• Ghost Town Fruit: you must make an offering to the dead in Ghost Town three times in order to unlock this trinket. To make things easier, buy only 12 Tobacco at the beginning of the scenario to reduce the amount of Tobacco, Doses Opium and Bottles of Liquor required to make an offering.
  
• Candle of the Dead (updated thanks to gesimon): in order to obtain this trinket you’ll need to prevent the Demonic Prince from cursing any altars during his assault on Ghost Town.

Method in Madness

• Meteor Dust Bomb: impossible to miss. You’ll get it automatically after retrieving the meteor from the crater.
  
• Revolving Revolver: it can only be unlocked by fully developing the gunsmithery technological domain.
  
• Doomsday Watch: it can only be unlocked by fully developing the engineering technological domain. Once you achieve that, go to Giant Clock and spend 8 Assorted Parts to receive this trinket.

Law & Order

• The Judicator: this is Cervantes’ starting weapon, so it's impossible to miss.
  
• Weird Monocle: once you unlock the informant at Indian Tent, pay Dohosan 200 gold to learn the identity of the Order member hiding at the Indian village. You’ll get this trinket after finishing the event at Indian Burial Grounds.
  
• Mammoth Rifle: you’ll receive it right after obtaining the last cipher piece if you carried out enough massacres during the scenario, but I don’t know how many you need to commit in order to unlock this trinket. I got it after massacring all locations except for one.

A Matter of Time

• Protector Ring Revolver: impossible to miss. You’ll obtain it after Lafortuna agrees to send your posse to hunt down The Protector.
  
• Tournament Trophy: it can only be unlocked by winning Lafortuna’s poker tournament. In order to achieve this, you'll need to make some preparations before joining the tournament:
  First, travel to Hospital and buy a Laxative Potion. Next, head for Gambling Den to enter a high stakes poker table and then lose the game on purpose to learn your opponent’s tells.
  Once said arrangements have been made, head to Reception Hall and, during the first break, choose to mingle between the crowd and to pour laxative on one of the contestant's drink in order to win the first round.
  During the next break ignore the man that will retire to his room. Once the second round starts, choose to attack Rossetti first and then bluff to defeat him. If this doesn't work, follow the man to his room and give him a second morphine shot (updated thanks to vynlevil).
  Next, dispatch Fay by using the knowledge you acquired at Gambling Den. Lastly, use Cassandra's precog powers to defeat Jim Vaughn and win the tournament.
  
• Cañón Calavera: you'll have to kill Joaquín Pérez during the second tactical mission of this scenario in order to unlock his signature weapon. Just be careful not to raise the bridge that leads to the little isles where the supply caches are stashed, as Pérez will be in that area.

On Earth, as it is on Hell

• The Judge: impossible to miss. The Devil will award Warren this weapon once he recruits the last member of his legendary posse.
  
• Oxen Skull: after confronting the Wizard, choose to ignore the fire and delve into the unexplored area. This will result in every posse member suffering a random injury, but you’ll also obtain this trinket.
  
• One-Armed Bandit: in order to get this trinket you'll have to solve the Evangelists’ Graves riddle, which can be achieved by going to any of the graves and entering the following combination: test of reaction –> test of agility –> test of emotion –> test of recovery. This will unlock a new location, Evangelist’s Stash, where you’ll obtain the high Heat version of the Ivory Flintlock Pistol.

Treasures of the Sierra Madre
Use 25 different usable items at least once


This achievement is quite self-explanatory and easy to earn if you follow 2 simple steps during every scenario: first, buy any new consumables you find at stores and try to complete every event in order to obtain some more unique consumables. Secondly, equip each of your characters with two different consumables before triggering each tactical mission. This will allow you to use 2-8 different consumables per tactical mission.

If you follow the above-mentioned steps since the beginning of the game, this achievement should pop up by the time you start the fourth scenario.


Aces in the Hole
Assemble the Five of a Kind hand


This achievement can be easily earned once you reach the end of any scenario, as by then you should have acquired enough cards to assemble this hand. In order to get this achievement you’ll just need to equip any character with 4 cards of the same rank and a joker.

If Lady Luck hasn’t been kind to you throughout the campaign, just enable the Full Deck game mod at the beginning of any scenario and you'll be able to assemble a Five of a Kind hand right after you beat the first tactical mission.

The Wild Bunch
Use at least 30 different characters during tactical encounters throughout the game


You’ll probably earn this achievement by the time you start playing through the eighth scenario, but I’ll list the missable posse members that can be recruited during certain scenarios just in case:

• Pat Douglas: he can be recruited during the Hard Times scenario. Go to Town after Florence leaves for Mexican Town and pay him 200 gold so he joins your posse.
  
  
• Old Ike: he can be recruited during the Hard Times scenario. Go to Shady Joint after Father leaves the posse and pay him 400 gold so he joins your posse.
  
  
• Scrawny Kid: he can be recruited during the As Good as Dead scenario once you rescue Old Man Murray from the cannibals. First, share a Bottle of Liquor with the natives at Indian Camp to unlock the Indian Totem location. Next, head there to sacrifice one of your posse members and then leave, which will prompt Scrawny Kid to ask to join your posse.
  
  
• Childeater: he can be recruited during the "Aspirton Bank Robbery” side quest of the As Good as Dead scenario. Once you arrive at Aspirton, choose to rob the bank during the day and you’ll be able to release him from imprisonment during the setup stage.
  
  
• Chip: he can be recruited during the Law & Order scenario. Right after visiting Indian Tent, go to Outlaw Joint and pay him 250 gold so he joins your posse.
  
  
• Dave Oshry: he can be recruited during the Law & Order scenario. Once you unlock the Indian Tent location, pay Dohosan 200 gold to learn the identity of the cipher piece carrier hiding at the smuggler den. Then travel to Cave and choose to only murder the Order member. Afterwards, Dave will ask to join your posse.
  
  
• Felicia Alambre: she can be recruited during the A Matter of Time scenario. Go to Adelante whenever Cassandra has her precog powers available and an option regarding going to the local brothel will appear. If you select said option and allow Hardin to rescue the harlot, she’ll ask to join your posse.
  
  
• Jefferson Burns: he can be recruited at the beginning of the On Earth, as It Is in Hell scenario. Once you're in control of Warren, ignore the Matthew’s Tomb location and head to Army Camp instead. Next, choose to listen to the soldier's conversation and then travel to Massacre Site. There you'll be able to recruit Burns by using the information you learned at Army Camp.
  
  
• Cheveyo: he will become available for recruitment once Burns joins your posse during the On Earth, as It Is in Hell scenario. Right after recruiting Burns, a new location, Sacred Grounds, will become available on the scenario map, so head there and let the Indian sniper kill Burns. Afterwards, he’ll join your posse.
  
  
• Lulu: (added thanks to Amorph Lex) she can be recruited instead of Hardin during the brothel rescue mission of the On Earth, as It Is in Hell scenario. First, go to Brothel to ask for a meeting with the madam and then choose to leave peacefully. Next, return to Brothel and choose to sneak inside. Once you're in the setup stage, get inside the room where Hardin is captive and you'll be given a choice; subdue Hardin to recruit Lulu and viceversa.

Sudden Death
Use Equalization in the first combat turn, then complete the mission without raising your characters' Hit Points with items

Equalization is an ability granted by the Ten of Diamonds card that reduces every character’s HP to 1, so, as soon as anyone runs out of luck, he/she will be as good as dead. However, there’s a catch to this achievement: it only states that you can’t use items to regain HP, but you’re free to use other methods. I have only tested one of them (using the Abdomen Puncture scar bonus to regenerate HP) but I guess that you could also make use of any HP regeneration-granting abilities such as Shadow Salve, Cannibal, Unholy Power or Prayer to get this achievement.

It’s also worth considering that any reinforcements that appear during any tactical mission will be at full health even if you used the Equalization ability in the first turn, but if you’re taking advantage of the above-mentioned healing methods you shouldn’t have any problems earning this achievement no matter how many of them show up.

You can easily get this achievement during the As Good as Dead scenario because Warren's initial ability is Shadow Salve and Murray will start off with the Gushing Wound injure, which will eventually turn into the Abdomen Puncture scar. Take advantage of said facts either during the “Raid the Demon’s Hideout” side quest or during the scenario's final mission (do note that reinforcements at full health will appear during this mission) to easily earn this achievement.


Arizona Colts
Complete any tactical encounter without firing weapons other than the Rusty Peashooter


If you unequip all weapons from a character before starting a tactical mission, he/she will automatically equip a Rusty Peashooter once the mission begins. This is the worst weapon of the game, as it only deals 2 Damage and has a -10 Aim penalty.

You can get this achievement during any tactical missions (except for the initial missions of any scenario) but I recommend earning it during the second tactical mission of the Hard Times scenario because it features really weak enemies. If you seek a more detailed explanation on how to earn this achievement, check the HT Mission 2 section of W.


The Shootist
Complete any tactical encounter firing sure shots (100% Chance to Hit) exclusively


There are two simple ways to earn this achievement: you can either exclusively use the scoped rifles’ special ability, Scoped Shot, to kill enemies or you can make your high Aim characters get closer to enemies so that they can fire sure shots at them.

I recommend taking advantage of the second method during the third tactical mission of the Hard Times scenario, as if during said mission you lock the manor's doors you’ll only have to defeat six enemies that will be standing inside an enclosed space. You can find additional details on how to achieve this in the HT Mission 3 section of W.

If you have difficulty carrying out any of the above-mentioned methods, just enable the Reaction Shot Disabled mod at the beginning of any scenario. This will allow your characters to get right next to enemies without triggering a reaction shot.

User xmJ pointed out an alternative way to easily get this achievement during the last tactical mission of the A Matter of Time scenario: simply line up a sure shot on one of the failed experiments guarding the machine an then activate it to end the scenario.


Blind Justice
Kill 10 enemies with blind shots (no line of sight)


A hidden enemy (grey badge) is an enemy that has no line of sight with any of your characters. The usual way of finding hidden enemies is by spotting their shadows, but you can also turn a normal enemy into a hidden enemy by making one of your characters spot them with their first action and then use your character's second action to break line of sight with said enemy; this will result in the previously spotted enemy turning into a hidden enemy.

Once you’ve located a hidden enemy, you'll be able to shoot at them if they are behind a tent or any other pierceable cover, but more often than not, you’ll have to use the Ricochet or Golden Bullet abilities to dispatch them.

There are plenty of opportunities to kill hidden enemies throughout every scenario, but if you are having trouble getting this achievement just take advantage of the peek-a-bullet tactic that is described in the Tactics and terminology section of W.


Fight No More Forever
Complete any tactical mission without firing a shot


There are very few tactical missions that can be completed without killing any enemies, but the easiest among them is the “Aspirton Bank Robbery” side quest of the As Good as Dead scenario. You can find a detailed explanation of how to earn the above-mentioned achievement in the AGaD Mission 4 section of W.

Note (added thanks to Valenquest): there's a catch with this achievement as well: "you don't need to be a pacifist in order to get "Fight No More Forever". You just can't use any abilities that involve shooting guns. Damaging abilites like equalisation and shriek don't count, making that achievement technically possible on any map. I think the same is true of damaging items like the nail and gas bombs, but I didn't test that. I actually found it easy to unlock this on the homestead defense in hard times".


Trickshooter
Kill an enemy with a bullet ricocheting off at least 3 different objects


The easiest way to get this achievement is during the final mission of the In Gold We Trust scenario, as it features three ricochetable objects that are really close to each other. You can find a detailed explanation of how to earn the above-mentioned achievement in the IGWT Final Mission section of W.


Brimstone Killer
Kill a demon while your character is in demon form


In order to earn this achievement you’ll need to use the Unholy Power ability card during any tactical mission that features demons, which are not that abundant. It is also worth mentioning that the transformation will only last for 5 turns, so you’ll need to make the transformed character kill a demon within that time frame.

The easiest way to get this achievement is during the third tactical mission of the Graveyard Shift scenario, as the Demonic Prince that it features can respawn by possessing his acolytes. If you want to make sure that you will have acquired the Unholy Power ability card by the time you reach said mission, just enable the Full Deck game mod at the beginning of the scenario. You can find a detailed explanation of how to earn the above-mentioned achievement in the GS Mission 3 section of W.


Fastest Gun in the West
Kill an enemy in the very first action in a tactical encounter


There are several tactical missions where you'll be able to earn the above-mentioned achievement, but I think that the easiest among them is the third mission of the In Gold We Trust scenario, as you'll be able to make Suncove, who starts off with a pistol that deals 8 damage, kill one of the enemies that will be standing at the entrance of the fort right at the beginning of said mission.

Scars of Freedom
Complete “Scars of Freedom”


Quite self-explanatory. You can find a complete guide of this scenario in W.


Dr Frankenstein
Complete any of the 'Golem' hands on a character and complete at least one combat encounter with that character

First of all I’ll warn you that, as far as I know, you can only meet the requirements for earning this achievement by the time you reach the end of the Scars of Freedom scenario.

Golem Hands are combinations of 5 grafts that grant great bonuses, just like poker hands. At the beginning of the scenario you’ll have one recipe on your inventory that lists the necessary ingredients to create one combination. As you progress through the scenario, you’ll find 4 new combinations, making a total of 5 Golem Recipes.

If you have any trouble getting this achievement, just check the Scars of Freedom scenario guide of W.


Army of Two
Complete the train assault with just Libertee and Phineas in your posse


In order to earn this achievement, you must complete the above-mentioned side quest before meeting with the two Evangelists at Greaves Basin, as after doing so they’ll permanently join your posse.

This tactical mission can be pretty challenging if you have only 2 characters in your posse, but you can read an effective strategy on how to succeed in the SoF Mission 3 section of W.


High Stakes
Win a liver in a game of dice


You can get this achievement as soon as you start controlling Aldous’ posse. Thanks to Envy I know now that winning the liver is purely RNG-dependent, but there are two somewhat consistent ways of obtaining it:

First method: Immediately after you gain control of Aldous’ posse, head to Maple Falls and select the look for body parts option, then decline to gamble and leave. Next, go to General Store and buy 1 Loaded Dice (don’t equip it on any posse member). Finally, return to Maple Falls and use the Loaded Dice you just bought to cheat at the dice game and win the liver.

Alternative method for obtaining the Gambler's Liver graft (added thanks to Casper): " I did a little extra reading and found out that when you return to the gambler with the Loaded Dice, you need to pick the first option (ie, gamble for the liver) and then you get a subsequent chance to use the dice. If you pick the second option (ie, cheat with the dice from the start), he catches you and you shoot him"

Bottom line is that you need to buy a Loaded Dice trinket and pray to RNGesus.


Human Resources
Collect at least 75 Ether from enemies fallen in one combat encounter


During the Scars of Freedom scenario each defeated enemy will yield 5 units of Ether as a mission reward, so you'll need to kill a minimum 15 enemies during any tactical mission in order to get this achievement.

There are only two tactical missions where you'll be able to perform said feat: Mission 5 and Mission 6. The first one features infinite spawning enemies, but you'll only have two characters at your disposal, so protracting the mission is a risky strategy that can easily lead to your defeat. The second one has a fixed number of 17 enemies (provided you're playing on Hard difficuty), so you’ll always get 85 Ether from defeated enemies after completing it.

If you want to learn the most efficient way to complete either of the above-mentioned missions, check the SoF Mission 5 and SoF Mission 6 sections sections of W.